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IGNITING COMBUSTION MIXTURE IN reactingFoam HOW msha

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Old   November 25, 2008, 07:27
Default HOW COULD BE A MIXTURE IN reac
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Mojtaba Shahmohammadian
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HOW COULD BE A MIXTURE IN reactingFoam IGNITED?
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Old   November 25, 2008, 09:13
Default Hello Mojtaba, set an initi
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Hello Mojtaba,

set an initial temperature and a composition which will ignite. E.g. start the calculation without reaction and use setField to set the temperature at a ignition point to say 1500K.

Regards markus
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Old   December 1, 2008, 02:48
Default hi thank you for advice
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hi

thank you for advice

but with an initial high temperature the domain will be purged after some time steps.

this is not the way

I want a better method(to ignite)

ANY SUGGESTIONS PLS.!
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Old   December 2, 2008, 00:57
Default IS NOT HERE ANY ONE TO SHARE E
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IS NOT HERE ANY ONE TO SHARE EXPERIENCE ON THIS!!?
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Old   December 2, 2008, 01:19
Default I think you have to look into
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ash
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I think you have to look into diesel foam for this. Mixture is ignited over there. You can view its tutorial file to get an idea about ignition and stuff.
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Old   December 2, 2008, 05:06
Default this is not the way you mentio
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this is not the way you mentioned Arun.
ANY SUGGESTIONS???
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Old   December 2, 2008, 08:00
Default Yes, I have a suggestion. stop
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Yes, I have a suggestion. stop using caps!!!

After that you can go here and have a look.

http://openfoamwiki.net/index.php/Contrib_reactingFoam

N
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Old   December 7, 2008, 04:00
Default thanks alot Nordin, it seems t
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thanks alot Nordin, it seems to be useful.
but if a better trick could be applied instead of increasing enthalpy I think it would be better,because in some circumstances temperature rises above of therm.dat limits (3500) and we have a janaf thermo error
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Old   December 8, 2008, 07:13
Default fixed! http://openfoamwiki.
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fixed!

http://openfoamwiki.net/index.php/Contrib_reactingFoam
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Old   December 13, 2008, 03:27
Default thank you! But this does no
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thank you!

But this does not solve the problem NIKLAS!

Janaf thermo error still remains after enthalpy increase
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Old   December 13, 2008, 03:31
Default Niklas you must first compu
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Niklas

you must first compute temprature after:
h[ignCell] += ignSite.strength()*magH;

then evaluate enthalpy increase(enthalpy icrease must not cause T>3500),and after that apply:

h[ignCell] += ignSite.strength()*magH;
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Old   December 14, 2008, 06:44
Default Another vague problem: Duri
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Another vague problem:

During parallel run the term "ignSites.cells()" in file "ignite.H" returns no cell and ignition does not occur.

but with a single cpu there is no problem.

Any suggestions!!!
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Old   December 14, 2008, 06:46
Default Another vague problem: Duri
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Another vague problem:

During parallel run the term "ignSites.cells()" in file "ignite.H" returns no cell and ignition does not occur.
it does not depend on the number of cpus or the method of decomposition.
but with a single cpu there is no problem.

Any suggestions!!!
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Old   December 14, 2008, 06:57
Default I thinks the problem arises wh
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I thinks the problem arises when this function

"meshSearch::findCell" is called.

Is my guess true?

Any suggestion is appreciated!
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Old   December 15, 2008, 04:00
Default Any help?
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Any help?
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Old   December 18, 2008, 02:31
Default Isn't here Some one to help wi
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Isn't here Some one to help with this!
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Old   January 15, 2009, 04:55
Default i am new to openfoam i am solv
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i am new to openfoam i am solving one combustion problem, i need to run a combustion problem.... i used XI-foam as solver, while running some errors are coming... i need to know which solver is good for combustion problem.. and few guidelines for solving combustion problem.
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Old   January 15, 2009, 04:58
Default i am new to openfoam i am solv
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i am new to openfoam i am solving one combustion problem, i need to run a combustion problem.... i used XI-foam as solver, while running some errors are coming... i need to know which solver is good for combustion problem.. and few guidelines for solving combustion problem.
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Old   January 17, 2009, 03:16
Default reactingFoam,dieselFoam and di
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reactingFoam,dieselFoam and dieselEngineFoam solve non-premixed combustion.
Others solve premixed and partially premixed combustion
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Old   February 4, 2009, 01:58
Default hi to everyone i am new to
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hi to everyone
i am new to openfoam, i am using openfoam1.4, i want to solve simple methane combustion problem so which solver can i use for solving in openfoam.. already i solved in fluent... plz reply me
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